Printing press



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2 Sheets-Sheet 1 IN V EN TOR ATTORNEY Nov. 27, 1928.

Filed April 20, 1923 I Nov. 27, 1928.

M. W. BRUESHABER PRINTING PRESS 2 Sheets-Sheet 2 Filed April 20, 1923Patented Nov. 27, 1928.

UNITED STATES PATENT OFFICE.

MARTIN W. BRUESHABER, OF CHICAGO, ILLINOIS, ASSIGNOR TO GOSS PRINTINGPRESS COMPANY, A CORPORATION OF ILLINOIS.

PRINTING PRESS.

Application filed April 20, 1923. Serial No. 633,399.

The invention relates to printing presses and more particularly to novelmeans in rotary printing presses to insure steady and true running ofthe form cylinders, especially at high speeds.

Objects and advantages of the invention will be set forth. in parthereinafter and in part will be obvious herefrom, or may be learned bypractice with the invention, the same being realized and attained bymeans of the instrumentalities and combinations pointed out in theappended claims.

The invention consists in the novel parts, constructions, arrangement-s,combinations and improvements herein shown and described.

The accompanying drawings, referred to herein and constituting a parthereof, illustrate one embodiment of the invention, and together withthe description, serve to explain the principles of the invention.

Of the drawings:

Fig. 1 is a. fragmentary side elevation with parts in section and withparts shown more or less diagran'imatically of a portion of a printingpress embodying the invention;

Fig. 2 is a fragmentary detail vertical section showing on an enlargedscale the parts at the central left hand side of 1;

Fig. 3 is a fragmentary top plan, with parts in horizontal section, andwith parts broken away on the line 33 of Fig. 1

Fig. 4 is a view showing a modified form of the device; and

Fig. 5 is a fragmentary section corresponding to the lower centralpartof Fig. 3, but showing a portion of the form cylinder in secti on.

The invention is directed to insuring steady and true running of thecylinders of a printing couple, and especially the form cylinder, infast rotary presses, and especially to effecting this withoutnecessarily in anywise chang ing the standard construction of theprinting couples, inking mechanisms and coopcrating parts.

More particularly the invention provides means bearing on the surface ofthe form cylinder, and acting substantially or approximately in the lineof, and in opposition to, the printing thrust between the form andimpression cylinders, the device being simple and inexpensive, occupyingbut little space and being located ina convenient place and, as stated,necessitating no changes in the usual construction of a standard press.

More particularly as embodied, in a press having the cooperating plateand form cylinders of multi-nlate length, usually fourplat-es long, theform cylinder has, in fixed position thereon, the centrally-locatedplate-retaining or clamping ring of usual construction. concave shoe, orother bearing member, bears against this stationar plate-clamping ring.and is located approximately substantially in the line of the printingthrust exerted between the cylinders, that is, it has an effective andsufficient component of pressure along the line of thrust to efficientlyperform the steadying and truing function.

The shoe is mounted on a cross beam which is preferably convenientlylocated between the form inking rollers and in a position not tointerfere with the handling of the form rollers or any parts of themechanism. The shoe or like bearing member is. regulable or adjustableas to its pressure upon the form cylinder. The steadying and truingdevice may be mounted directly on the line of the printing thrust exceptwhere this will render the handling of the form rollers or other partsdi'llicult. or unhandy.

Other features of the invention will be primarily set forth inconnection with the following detailed description of the invention, butit will be understood that the foregoing general description and thefollowing detailed description are illustrative and exemplary but arenot restrictive of theinvention.

Referring now in detail to the embodiment of the invention illustratedby way of example in the accompanying drawings, a printing couple isshown, having a form cylinder 1, with a. shaft 2, which is journaled inbearings 3 at either side, these hearings being carried in the sideframes 4 of the press. The web of paper 00 is shown running about theii'npression cylinder andbeing printed upon by the form or platecylinder. I

Cooperating with the impression cylinder 1 is a form cylinder 8, havinga shaft 9 journaled in bearings 10, which are likewise carried in theside frames 4 of the press, these bearings being shown in a conventionalman- A suitable inking mechanism (shown in part only and more or lessconventionally) supplies ink to the plates upon the form cylinder, andas shown, form rollers 11 and 12 are mounted in the usual manner, andare run in "contact with the semi-cylindrical plates on the formcylinder. The form rollers are supplied with ink by an ink drum 13, andthis in turn is supplied bv any suitable mechanism from an ink fountain(not shown).

The semi-cylindrical stereotype plates, or other printing plates 14, areheld upon the cylinder by suitable means, the usual means being a seriesof clamping rings, and the pres ent invention is shown preferablyapplied to such a standard construction and arrangement. The formcylinder is of muitiplal'e length, and a plate clamping ring 15 iscarried in xed position centrally of the cylinder, the ring having theusual beveled undercut along each side thereof, beneath which thecorrespondingly beveled arcuate edges of the printing plates fit to holdthem in position. A plurality of intermediate plate-clamping rings 16,which may be of the usual type or form are shown, these being movable orpositionable longitudinally of the cylinder to receive, to hold and torelease the plates in the usual manner. Likewise plate clamping endrings 17, which are also movable lengthwise of the cylinder for holdingtwo outside plates or series of plates are shown.

In the preferred embodied form of the invention, the cylinder-engagingsteadying and truing member is a shoe 25, having an arcuate face 26shaped and positioned to bear on the cylindrical outer periphery of thestationary or fixed plate-clamping ring 15. This shoe is variably andregulably positioned so as to bear upon the clamping ring withsufficient force to compel the form cylinder to run true, and to preventany wabbling or sag of the cylinder, while on the other hand thefriction is not such as to be practically objectionable. This steadyingand truing pressure is applied medianly and in fact preferablyabsolutely centrally of the form cylinder, and is applied successfullyand effectively to the periphery or exterior of the ordinary cylinderstructure without requiring any changes to be made therein. 7

The pressure is also exerted approximately, or to a highly proportionatedegree, in the line of the printing thrust between the form cylinder andthe impression cylinder. In the drawings this steadying and truingdevice is ap plied between the form inking rollers 11 and 12, as thisconstitutes a convenient location therefor where it will not interferewith the handling of any of the usual mechanism.

The steadying and truing shoe, or equivalent device could be optionallyapplied above the form inking roller 11 and absolutely in the line ofthe printing thrust exerted between the cylinder. In its presentposition a very large, and sufiicient component of the steadying andtruing pressure is exerted along the line of printing thrust.

In the embodied form of mounting for the steadying and truing device, abeam or strut 27 extends across between the side frames 4 of the press,and at its ends it has flanges 28 and 29 abutting on the inside faces ofthe side frames 4 of the press, and secured thereto by bolts 30. In thepreferred form there are also incorporated devices for variablypositioning the shoe, or other steadying and truing member, to regulateits relative position and consequcntlv the amount of pressure exertedupon the form cylinder. As embodied, the central part of the beam 27 iscut away to fit the width of the shoe (as will be best seen from Figs. 3and 5) and the shoe is preferably seated upon a supporting bar 35, fixedto the beam 27 in suitable manner, as by screws 36, the bar extendingacross the opening or recess in the beam, and the shoe resting upon thetop thereof.

Also fitting slidingly in the recess in the beam 27, behind the shoe 25,is a beveled wedge or block 38, the rear surface 39 of the wedge restingagainst the back wall 40 0f the opening in beam 27, and the frontsurface 41 of the wedge being in contact with the rear surface 42 of theshoe 25. The block is slightly beveled upwardly and forwardly in Fig. 2so that as it is moved downwardly it will cause the shoe to moveoutwardly and to exert greater pressure on the form cylinder, and whenthe wedge or block 38 is moved upwardly the reverse will he the case.

The embodied form of means for movingthe block 38 comprises a bolt 45fitting rotatablv in a longitudinally disposed aperture in the wedge orblock 38, and having a retaining nut 46 screw-threaded on the bottom endthereof. On the upper face of the block 38, the bolt 45 is shoulderedoutwardly and is of increased diameter, and this part is provided with ascrew'thread 49, which screws into a tapped screw-thread 50, formed in acorresponding orifice or opening in the top of the beam 27. Thus byrotating the bolt 16, by a screw driver or other convenient toolinserted 1 into the slot 51, the block 38 may be moved upwardly ordownwardly, and the shoe 25 thereby moved inwardly or outwardly slightlyin a radial direction with respectto the from cylinder and the plateclamping ring 15 upon which the shoe bears, to regulate the pressureupon the form cylinder.

In Fig. 4 a modified form is shown wherein a plurality of rollers 58 and5a are mounted in'the shoe 25 the rollers in this case constituting theelements bearing upon the ring 15, although the intermediate part orparts of the shoe may also be used as a steadying andtruing surface. Formost uses, however, the shoe 25 bearing directly upon the plateclamplU-i ing cylinder, as shown in the preceding figures and as alreadyfully described, will be found preferably and most efiicacious.

The invention in its broader aspects is not limited to the specificmechanisms shown and described but departures may be made therefromWithin the scope of the accompanying claims Without departing from theprinciples of the invention andwithout sacrificing its chief advantages.

lVhat I claim is 1. A rotary printing press including in combination aform cylinder, an impression cylinder, means for supplying ink to theform cylinder comprising an ink drum and two form rollers, and a memberengaging medianly With the exterior of the form cylinder to insure truerunning thereof, said member being mounted in the space between the inkto resist the major component of thrust from i the impression cylinder.

2. A rotary printing press including in combination a form cylinder, animpression cylinder, means for supplying ink to the form cylindercomprising an ink drum and tWo form rollers, and a variablypositionable, concave bearing member engaging medianly With the exteriorof the form cylinder to insure true running thereof, said member beingmounted in the space between the ink drum, form rollers and formcylinder so as to resist the major component of thrust from theimpression cylinder.

In testimony whereof, I have signed my name to this specification.

MARTIN W. BRUESHABER.

